40A
ANALYTICAL CHEMISTRY
ûreater Dispersion WHERE YOU NEED IT MOST..:
Τ J-HE chart tells the story. Greater dispersion in the ultra-violet range with the Bausch & Lomb Large Littrow than with any other spectrograph. That's where it counts in helping you solve most of your spectrograph problems more easily, more accurately. You get sharp, clear iden tifying lines from 2200A to 3500A—the range where most of the major elements are found . . . the range where poor separation of spectral lines prohibits satisfactory work with instruments of lesser linear dispersion. Additional advantages include: sturdy construction, in suring rigidity, permanent alignment and adjustment; two readily interchangeable optical systems, providing a wavelength range of 2100A to 10,000 A. Bausch & Lomb optical and mechanical achievement makes the Large Littrow Spectrograph the most satis factory single instrument yet devised to meet all your spectro-analytical problems.
To Help You Get Greater Accuracy, Efficiency and Safety in Your Spectrographs Laboratory,..
MEDIUM QUARTZ SPECTROGRAPH SPECTRUM PROJECTOR
ARC AND SPARK STAND
A/AÎ& for information and demonstration. Bausch & Lomb Optical Company, 609-M St. Paul Street, Rochester 2, New York. BRIQUETTING PRESS
ELECTRODE SHAPER
DENSITOMETER
Bausch & Lomb Spectrographic Equipment
